# Amputations at Northern States Power Company
> OSHA SIR `2019055358` · 5/29/2019 · LADYSMITH, WISCONSIN
## Severity
- **1 amputation**
- **Body part:** Fingertip(s)
- **Nature of injury:** Amputations
## Cause
- **Event:** Struck against stationary object or equipment, n.e.c.
- **Source:** Fans, blowers-wall, floor, ceiling, ventilation
- **Secondary source:** Nails, brads, tacks, nuts, bolts, washers
## Employer
- **Name:** Northern States Power Company
- **Location:** Ladysmith Hydro, LADYSMITH, WISCONSIN, 54848
- **NAICS:** 221111
- **Jurisdiction:** 1
## Narrative

On May 29, 2019, at 1:30 p.m., an electrical maintenance technician was using a wrench to tighten a bolt on a roof exhaust fan assembly. As the employee was tightening the bolt, it broke causing their right hand to strike against the fan assembly resulting in amputation of the ring and index fingertips. The fan's energy source was isolated and locked out at the time.

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*Source: [OSHA Severe Injury Reports](https://www.osha.gov/severe-injury-reports) · MORVS · CC0 1.0*